2.0.0 (2016-05-26)

• Add -implicit-bindings option to automatically bind expressions to names _0, _1 and so on. For example, 3 + 4;; becomes let _0 = 3 + 4;; (#161, #193, Fabian Hemmer)
• Add tab completion for #mod_use (#181, Leonid Rozenberg)
• Mention #help in #utop_help (#190, Fabian Hemmer)
• Add #utop_stash and #utop_save to save the session to a file (#169, #199, Christopher Mcalpine and Fabian Hemmer)
• Fix a bug where utop wouldn't apply ppx rewriters when running in emacs (Bug report: #192, fix: #202, Deokhwan Kim)
• Drop support for camlp4/camlp5
• Drop support for OCaml <= 4.01
• Switch the build system to jbuilder
• Resurect UTop_main.interact